/*****************************************************************************/
/*                                                                           */
/*                                 fileid.c                                  */
/*                                                                           */
/*               Determine the id of a file type by extension                */
/*                                                                           */
/*                                                                           */
/*                                                                           */
/* (C) 2003-2012, Ullrich von Bassewitz                                      */
/*                Roemerstrasse 52                                           */
/*                D-70794 Filderstadt                                        */
/* EMail:         uz@cc65.org                                                */
/*                                                                           */
/*                                                                           */
/* This software is provided 'as-is', without any expressed or implied       */
/* warranty.  In no event will the authors be held liable for any damages    */
/* arising from the use of this software.                                    */
/*                                                                           */
/* Permission is granted to anyone to use this software for any purpose,     */
/* including commercial applications, and to alter it and redistribute it    */
/* freely, subject to the following restrictions:                            */
/*                                                                           */
/* 1. The origin of this software must not be misrepresented; you must not   */
/*    claim that you wrote the original software. If you use this software   */
/*    in a product, an acknowledgment in the product documentation would be  */
/*    appreciated but is not required.                                       */
/* 2. Altered source versions must be plainly marked as such, and must not   */
/*    be misrepresented as being the original software.                      */
/* 3. This notice may not be removed or altered from any source              */
/*    distribution.                                                          */
/*                                                                           */
/*****************************************************************************/

#include <stdlib.h>
#include <string.h>

/* common */
#include "fileid.h"
#include "fname.h"

/*****************************************************************************/
/*                                   Code                                    */
/*****************************************************************************/

int CompareFileId(const void *Key, const void *Id)
/* Compare function used when calling bsearch with a table of FileIds */
{
  return strcmp(Key, ((const FileId *)Id)->Ext);
}

const FileId *GetFileId(const char *Name, const FileId *Table, unsigned Count)
/* Determine the id of the given file by looking at file extension of the name.
** The table passed to the function must be sorted alphabetically. If the
** extension is found, a pointer to the matching table entry is returned. If
** no matching table entry was found, the function returns NULL.
*/
{
  /* Determine the file type by the extension */
  const char *Ext = FindExt(Name);

  /* Do we have an extension? */
  if (Ext == 0) {
    return 0;
  }

  /* Search for a table entry and return it */
  return bsearch(Ext + 1, Table, Count, sizeof(FileId), CompareFileId);
}
